From owner-freebsd-current@FreeBSD.ORG  Mon Dec 15 23:35:18 2003
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id B377616A4CE
	for <current@freebsd.org>; Mon, 15 Dec 2003 23:35:18 -0800 (PST)
Received: from gaia.roc2.gblx.net (gaia.roc2.gblx.net [208.49.223.89])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 20B0C43D1D
	for <current@freebsd.org>; Mon, 15 Dec 2003 23:35:17 -0800 (PST)
	(envelope-from dsf@gblx.net)
Received: from gaia.roc2.gblx.net (localhost [127.0.0.1])
	by gaia.roc2.gblx.net (8.12.10/8.12.9) with ESMTP id hBG7ZG4t012944;
	Tue, 16 Dec 2003 07:35:16 GMT
Received: (from dsf@localhost)
	by gaia.roc2.gblx.net (8.12.10/8.12.10/Submit) id hBG7ZETQ010191;
	Tue, 16 Dec 2003 07:35:14 GMT
Date: Tue, 16 Dec 2003 07:35:14 +0000
From: Dan Foster <dsf@globalcrossing.net>
To: "Yan V. Batuto" <batuto@wgc.chem.pu.ru>
Message-ID: <20031216073514.GA6783@gblx.net>
References: <20031216010608.E4CAC16A4D0@hub.freebsd.org>
	<200312161023.00227.batuto@wgc.chem.pu.ru>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200312161023.00227.batuto@wgc.chem.pu.ru>
User-Agent: Mutt/1.4.1i
cc: Matt Loschert <loschert@servint.com>
cc: Munish Chopra <chopra@soulwax.net>
cc: current@freebsd.org
Subject: Re: 5.2-RELEASE TODO
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 16 Dec 2003 07:35:18 -0000

Hot Diggety! Yan V. Batuto was rumored to have written:
>
> Just my $0.02: Problem #1 is not confined to -CURRENT too.
> I hear crackles in the output sound on my old pentium running 4.9-stable. And
> soundcard there is "simple SB16" too -- ISA CL4135 (afair). 
> (Sorry, I can't reach it in the moment to get full dmesg.)
> It looks like crackles occurs during disk activity -- they sounds exactly 
> synchronously with IDE LED blinking. I tried to switch vchans on and off,
> but without any audible changes.

Crackling, from my understanding, usually means timing problems...
especially if it can't get enough time to do its stuff.

In your case, perhaps some sort of pre-emption due to servicing ATA disk
requests, indirectly causing sound driver timing issues?

-Dan